The seasonal biological surveys of 1971 / John C. Ayers, Samuel C. Mozley, John A. Stewart.

FIGURES

Page
1. The Cook Plant sampling stations.............. 2
2. The position of the thermal bar (4~C) in the
Cook survey grid on 15 April 1971.............. 6
3. Phytoplankton, cells per 0.01 ml, at the
stations of the 15 April 1971 Cook Plant survey....... 8
4. Zooplankton, organisms per liter, at the stations
of the 15 April 1971 Cook Plant survey........... 9
5. Averaged abundances of phytoplankters (upper) and
zooplankters (below) by half-degree temperature
intervals, 15 April 1971.... 11
6. Averaged numbers of zooplankters per liter at
different depth intervals in the Aprils of
1971, 1972, and 1973 under thermal bar, pre
thermal bar, and post thermal bar conditions... 12
2
7. Mean numbers per m of total animals (benthic
macroinvertebrates excluding Mysis relicta)by
benthic depth zones and seasons............ 53
2
8. Mean numbers per m of minor Chironomidae by
depth and season..................... 54
2
9. Mean numbers per m of Pontoporeia affinis
(PA) and Stylodrilus heringianus (SH) by
depth and season...................... 55
2
10. Mean numbers per m of Pisidium (PI) and
Tubificidae (TU) by depth and season............ 56
2
11. Mean numbers per m of Sphaerium nitidium (SN)
and Sphaerium striatinum (SS), which are sphaeriid
clams, total Gastropoda (GA) (at least 3 species)
and total Hirudinea (HI, at lecst 4 species) by
depth and season...................... 57
2
12. Mean numbers per m of large Chironomidae by
depth and season..................... 58
13. Percentages of Pontoporeia affinis populations
in size and season................... 62

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